CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

This is a custom status line binary for Claude Code, written in Go. It replaces shell-based status line scripts with a compiled binary for better performance. The binary reads JSON from stdin (provided by Claude Code) and outputs a formatted status line with ANSI colors.

Build and Development Commands

This project uses Task as its build tool.

# Build (default)
task build           # Build with stripped symbols to bin/statusline

# Testing
task test            # Run unit tests (go test -v ./...)
task test:cover      # Run tests with coverage
task test:fixture    # Test with fixture JSON and show timing

# Linting
task lint            # Run golangci-lint
task lint:fix        # Run golangci-lint with auto-fix

# Other
task run             # Build and run with test fixture
task tidy            # Run go mod tidy
task install         # Install binary to ~/.claude/
task size            # Show binary size
task clean           # Remove bin/ directory

Architecture

Single-file Go application (main.go) that:

Reads JSON from stdin - Parses Claude Code's status hook payload (StatusInput struct)
Gathers system state:
- Gitea process status via gopsutil (cross-platform process listing)
- Git repository info via go-git (branch name, dirty state)
- Terminal width via unix ioctl
Outputs formatted status line with ANSI colors, padding to terminal width

Key functions:

formatContextInfo() - Formats token usage as "Xk/Yk"
getGiteaStatus() - Returns green/red dot based on gitea process running
getGitInfo() - Returns git branch and dirty indicator
stripANSI() - Removes ANSI codes for visible length calculation

JSON Input Format

The binary expects Claude Code's status hook JSON via stdin. See test/fixture.json for the complete structure. Key fields used:

model.display_name - Model name to display
workspace.current_dir - Current directory path
context_window.context_window_size - Total context window tokens
context_window.current_usage - Current token usage (may be null)

Dependencies

github.com/go-git/go-git/v6 - Pure Go git implementation
github.com/shirou/gopsutil/v4 - Cross-platform process/system info
golang.org/x/sys - Unix system calls (terminal size)

2.4 KiB Raw Permalink Blame History